Desenvolvimento de uma ferramenta computacional para o dimensionamento de vigas de concreto armado submetidas à torção

Abstract

The present work carried out the analysis of reinforced concrete beams subjected to torsional forces. It is worth noting that torsion design is not a trivial process and requires specific knowledge to be accurately performed. In this context, a computational tool was developed with the aim of sizing beams with rectangular sections subjected to torsion. The tool was developed using Microsoft Excel® software and followed the design guidelines based on the formulations of ABNT NBR 6118:2014 standard. The tool was validated through problems from the literature. After validation, the tool was applied in a parametric study to analyze the influence of cross-sectional dimensions on the steel area for torsion reinforcement. The effect of concrete strength (fck) on the design of torsion beams was also evaluated. The results showed that, for the analyzed dataset, the beam height has a greater influence on the steel area than the width. Additionally, for the studied dataset, the study of concrete characteristic strength revealed that fck is a parameter that limits torsion design, due to the verification of concrete strut crushing. The resulting tool can be used by professionals and civil engineering students interested in sizing beams with polygonal sections subjected to torsion in research or practical applications.